winperc.js

// calculates win percentage of makuuchi matches on sumodb.
// use on e.g. http://sumodb.sumogames.de/Rikishi.aspx?r=1123 where it should yield "84.9" as of now.
// losses by default are excluded, but wins by default are included; as is standard in sumo records.
$("tr").map((n, tr) => {
 const k = $("td.cat", tr);
 const v = $("td.val", tr);
 if (k.text().toLowerCase().indexOf("in makuuchi") !== 2) {
  return;
 }
 const r1 = v.text().split(" ");
 const r2 = r1[0].split("/");
 const r3 = r2[0].split("-");
 const wins = Number(r3[0]);
 const losses = Number(r3[1]);
 const percentage = (wins / (wins + losses) * 100).toFixed(1);
 console.log(percentage);
});